Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6853482

Ullmann, J L; Rapaport, J; Lisowski, P W; Byrd, R C; Carey, T; Taddeucci, T N; McClelland, J; Rybarcyk, L; Haight, R C; King, N S.P.

It has been recognized for a number of years that certain spin-isospin components of the nucleon-nucleus effective interaction can be inferred from (p,n) reactions to states of known nuclear structure. For L = 0, S = 0 and L = 0, S = 1 transitions, the 0-degree (p,n) cross section can be related respectively to Fermi and Gamow-Teller beta decay matrix elements. If these transitions occur in the same nucleus, the ratio of isovector spin-flip to non-spin-flip effective interactions can be measured without regard for absolute normalization. The best reaction to measure this is /sup 14/C(p,n) which goes by a pure Gamow-Teller transition to the 1/sup /plus// state at 3.95 MeV in /sup 14/N, and Fermi transition to the 2.31 MeV 0/sup /plus// state. This work extends the ratio measurements made at lower energies (ref. 1, 2, 3) to 492 and 590 MeV. We also report on the /sup 13/C(p,n) reaction which goes by a pure GT transition to the 3.51 MeV 3/2/sup /minus// state in /sup 13/N, but by a mixed Fermi plus Gamow-Teller transition to the 1/2/sup /minus// ground state. 11 refs., 4 figs., 2 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6853482
• Report Number(s): LA-UR-88-1787; CONF-880386-8; ON: DE88014470
• Country of Publication: United States
• Language: English

Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
BARYON REACTIONS
CARBON 13 TARGET
CARBON 14 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ENERGY SPECTRA
GAMOW-TELLER RULES
HADRON REACTIONS
MATRIX ELEMENTS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PROTON REACTIONS
SPECTRA
TARGETS
TRANSITION AMPLITUDES